A trip is taken that passes through the following points in order

Point A 0 m

Point B 15.0 m

Point C -30.0 m

Point D -20.0 m

Point E 10.0 m

Point F 5.0 m

What is the distance from Point A to Point E?

Iwannasay c is the most accurate

Velocity is the speed of an object in a certain direction so you'd need to know speed and direction

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.